Device for locking desk-telephones.



G. D. RHINBHART, JR. & L. P. SAPONOPF.

DEVICE FOR LOOKING DESK TELEPHONES.

APPLICATION FILED JAN. 31, 1913.

\ Patented Aug. 12,1913.

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UNITED STATES PATENTOFFIOE.

CLARK D. RHINEHART, JR., AND LUBOMIR P. SAPONOEF, OF NEW YORK, N. Y.; SAID SAIPON OFF ASSIGNOR TO THOMAS MCGONIGAL, 0F, BROOKLYN, NEW YORK.

DEVICE FOR LOOKING DESK-TELEPHONES.

Specification of Letters Patent.

Patented Aug. 12,1913.

Application filed January 31, 1913. Serial No. 745,505.

To all whom it may concern Be it known that we, CLARK D. RHINE- HART, Jr., residing at 2337 Foster avenue, Brooklyn, in the county of Kings, city and State of New York, and LU'BOMIR P. SAroN- OFF, residing at 629 Eleventh street, Brooklyn, in the county of Kings, city and State of New York, both citizens of the United States, have invented a new and useful Device for Locking Desk-Telephones, of which the following is a specification.

Our invention consists mainly of two semicircular castings of metal hinged at the center. The hinge is provided with two coils of spring wire, one between the first and second section, the other between the second and third section and so disposed around the pivot of the hinge and the surfaces of the two semicircular halves (to be described below) so that the clasp, when unlocked, will be automatically thrown open as the springs regain their normal state. Opposite the hinge at the end of the first semicircular half is a projection rectangular in general form and flush top and bottom with the cylindrical body of the clasp. On the inner surface there is a small perforated projection intended to cooperate with a correspondin part of the mechanism of the look at the ot er end of the clasp. The outer and under side of this rectangular projection is prolonged into a flange, which cooperating with a similar prolongation of the opposite end of the other semicircular half, serves, when the clasp is'closed and locked to prevent a circular horizontal movement away from the receiver hook of the telephone. The function of these flanges is supplemented by the action of an'adjustable screw, headless and with the lower portion unthreaded, and placed vertically and centrally through the above mentioned rectangular pro 'ection. This screw is automatically covere and concealed and mechanically protected at the locking of the clasp by a rectangular headpiece at the up er end of the second semicircular half of t e clasp which extends horizontally over the adjusting screw. By the adjustability of this screw an exact fit may be established between the upper surface of the receiver hook and the lower edge of the protruding rim at the upper end shaft. So that when the clasp is placed around the shaft between the above mentioned points and closed and locked it will effectively prevent verbal communication through that telephone.

We attain the object set forth above with the mechanism illustrated by the accompanying drawings of which Figure 1 represents a vertical section through hinge and through the rectangular projection showing adjustable screw. Fig. 2 represents a side elevation of the entire clasp. Fig. 3 represents a top view of clasp. Fig. 4 represents a front view of clasp. Fig. 5 represents the clasp in perspective, partly open.

Similar letters refer to similar parts throughout the several views.

The letter A shows the adjusting screw in rectangular projection I.

The letter B shows projecting head piece which fits over rectangular projection and conceals adjusting screw when the clasp is locked.

The letter C shows flanges at ends of clasp.

Letters D D show the two semicircular halves constituting the body ofthe clasp.

Letter E shows pivot through hinge.

The letters F F show springs to force clasp open when unlocked.

The letter G shows perforated projection which cooperates with a corresponding part in the mechanism of the look at the opposite end of clasp.

The letter H shows the exterior portion of the lock in which the keyhole is placed.

The letter I shows the rectangular projection.

We claim:

In a telephone locking device the combiof the telephone transmitternation of a eylindrical hin 'ed clasp a recmeans for the claspand a s ring for the tangular projection and a ifange carried by hin'ge, all substantially-as set erth.

one limb of the clasp, an adjustingscrew CLARK RHINEHART JR carriei by said pr'o'ection a flan e 'cofip- 5 erating with the I a ove-nfentione flange, LUBOMIR SAPONOFF- and a projecting headpiece adapted'to con- Witnesses:

cee} the screw when'theelas is closed car WnmAM V; BURKE, ried by the other limb of sai c1asp, 1ocking 'ARTHUR-"A. SEABREY. 

